Homeowners can modify some handbook dampers using a lever or deal with. But, automatic dampers have to have a Professional. If unsure, it’s safer to talk to an HVAC skilled to prevent destruction. UL Outlined – The KBD exhaust hood balancing damper permits many hoods connecting to a common exhaust https://basementventilation80011.bloggosite.com/43885918/new-step-by-step-map-for-air-control-dampers-for-hot-climates